There are loads of desktop 3d printers available these days. Chances are, you know someone who has one. Or maybe you've seen one at your kid's school. But should you buy a 3d printer? If you or your family members are interested in technology or DIY crafts, a 3d printer might be a fun tool to have around. Keep in mind that they often involve a bit of trouble-shooting, tinkering and maintenance. So, as long as you have the patience to solve the occasional mechanical issue (such as cleaning a clogged nozzle) you should be good. You'll also have to...